Mattress



H. E. WOLF May 13, 1930.

MATTRES 5 Filed Jan. 13, 1928 INVENTOR. BY A y 7 .1%

74; ATTORNEYS.

Patented May 13, 1930 UNITED STATES PATENT OFFICE HARRY E. WOLF, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO FORT PITT BEDDING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA MATTRESS Application filed. January 13, 1928. Serial No. 246,437.

This invention relates to mattresses and more particularly to the manufacture of the so-called roll edges thereof.

\Vhen ordinary stitching is employed in manufacturing the roll edge of a mattress,

a single break in the twine or cord causes the entire stitching to give way, that is, permits the twine to pull or slip out of place and the roll edge to become unstitched, with the 0 result that the roll edge is destroyed. A socalled lock stitch, of such character that the stitching will not come out as a result of a break in the cord, has been used to overcome this defect, but this stitch has been more or less dependent upon the use of delicate and intricate machinery for making the same.

An object of this invention is to provide an improved form of lock stitch for the roll edges of mattresses.

A further object is to provide a non-slipping stitch capable of being easily and rapidly made by hand.

These and other objects which will be ap parent to those skilled in this particular art are attained by means of the invention illustrated in the accompanying drawings in which Figure 1 is a partial view of a mattress with the roll edge broken. away to show separate stitches illustrating diiferent embodiments of the present invention, and Fig. 2 is a similar view illustrating an additional form of the present invention.

The drawings show my improved form of stitching for sewing the roll edge 5 of a matin sewing the roll edge of a mattress for the reason that a cut or break in the twine causes the stitching to slip and become undone, with the result that the roll edge of the mattress is destroyed. The present invention contem- 4.5 plates a lock switch of such arrangement that it can be easily and quickly made by hand if desired.

As illustrated, the present invention provides a lock stitch which is so formed as to provide a number of co-operating loops formed by the twine which is passed through the mattress edge in such a manner that the loops cross each other and partially overlap in. such a manner that even in caseof a cut or break in the cord the looped portions of the stitch will bind upon the material of the mattress and keep the stitch from slipping or being pulled out. I v

. The simplest form of stitch illustrated as embodying the present invention is that shown at the left of Figure 1. This stitch is formed by a plurality of partially overlapping loops of such arrangement that the sides of some loops cross each other and other sides of other loops coincide. In making the illustrated stitch, a loop 9 of triangular shape is formed by threading the cord through the mattress edge to form vertically extending leg 10 of the loop. The cord is then carried forward along the bottom of the roll edge to form a base bottom leg or porton' 11 of the loop, and the opposite leg 12 or hypotenuse of the loop is formed by carrying the cord diagonally through the roll edge from the bottom back to the point of first entry or the start of the first leg .10. The cord emerges from the top of the roll at the point of first entry and is then carried forward a distance of approximately-half an inch and then downwardly through the mattress edge in a diagonal manner to provide a leg 13 or hypotenuse of a second triangular loop 14. The hypotenuse or leg'13 crosses the hypotenuse leg 12 of the first loop and emerges from the bottom of the roll edge at the point of the exit of the leg 10 of the first loop. The triangular loop 14 is completed by carrying the cord forward along the bottom of the roll to form a bottom leg or base 13 on the second loop, and then up through the hole through which the cord entered the edge at the beginning of leg or hypotenuse 12. However, the cord is this time carried vertically upward to the point of entry of the leg or hypotenuse 13 on the top of the roll edge to form the leg 15 which completes the second loop 14. This completes the stitch and the cord is carried forward to the next stitch which is made in a similar manner.

It will be apparent that the cord is threaded through the mattressedge in such a manner as to provide triangular loops 9 and 14 which partially overlap each other. The hypotenuse legs 12 and 13 of the respective loops cross eachother so as to form a more or less figure 8. The upper portions or acute ends 17 and 18 of each loop are spaced from each other in the direction of the stitching while the opposite portions or bases 11 and 13' of each loop are substantially superimposed. It will be apparent that such a stitch will snub the cord and cause it to bind upon the material of the roll edge so that even if the cord is cut or broken the stitching will hold and the roll edge of the mattress will 'not be destroyed.

The stitching illustrated to the right in Figure 1 is similar to that above described with the additional feature that the thread forming the last leg or hypotenuse 12 of the first loop 9 is caused to emerge from the roll edge in such a manner that a portion 12 thereof passes around the upper end of the vertically extending leg at the acute end of the loop 9 and is then carried forward in such a way that a portion thereof passes around the upper end of the vertically extending leg 15 or the acute end of the second loop. This form of stitching, obviously, has an increased locking effect because of the interlocking or looping arrangement between the legs of each oop.

The stitching illustrated in Fig. 2 is similar to the stitching illustrated at the right of Fig. 1 with the addition of a further locking feature. The thread of the two loops is knotted together so as to form a knotted lock stitch. This is done by throwing a double loop 16 at the bottom of the first leg 10 of the loop 9 and the needle and twine are passed through these loops on the second downward pass which forms the first leg 13 of a second loop 14. Obviously when tightened this forms a knot which will not slip under any ordinary strain.

It is to be noted that the lock stitches shown in Figs. 1 and 2 are substantially rectangular in form. The long sides 10 and 15 of the rectangle extend through the mattress from top to bottom, and the short sides or ends thereof lie along the top and bottom faces of the mattress. It is to be observed also that the hypotenuse legs 12 and 13 of the triangular loops 9 and 14 form intersecting diagonals for the rectangle, the ends of which loop around the sides of the rectangle at the corners thereof as indicated at 12 or 15 in Figs. 1 and 2. In the form of stitch shown at the left in Fig. 1, the diagonals 12 and 13 terminate in the corners of the rectangle but are not looped around the sides 10 and 15.

hat I claim as new and desire to secure by Letters Patent is 1. The method of stitching the roll edge of amattress, which consists in threading a cord vertically through said edge, then horizontallyalong one side of said edge, then diagonally back through said edge to the point of first entry, then horizontally along the opposite side of said edge, then diagonally through said edge to the point'of'first exit at the opposite side of said edge, then horizontally with said first horizontal portion, then vertically through said edge to the point of entry of said second horizontal portion.

2. A'lock stitch for the roll edge of a inattress comprising a pair of triangular loops embedded in the mattress with the hypotenuse legs of the angles crossing each other intermediate the top'and bottom sides of the mattress and with the bases of the angles lying in overlapped position at one side of the mattress, the cord forming the vertical legs of the angles being continued at right-angles to the vertical'leg of one of the triangular loops in a direction toward the next stitch,

.and' atop connection uniting the acute ends of the hypotenuse legs and'ext'ending from one vertical leg to the other.

A lock stitch for the roll edge of amattress comprising apair of triangular loops embedded in the mattress with the hypotenuse legsof'the angles crossing each other intermediate the top and bottom sides of the mattress and with the bases of the angles lying in overlapped position 'at one side of the mattress, the cord forming the vertical legs ofthe angles being continued at right-angles from one of the vertical legs across the face of the mattress to the next stitch, and a top connec tion uniting the acute ends of the hypotenuse legs and extending'from one vertical leg-to the other, portions of the cord forming the triangular loop being looped around adjacent legs in a plurality of places to form locks for the stitch.

4. A look stitch for the roll edge of a mattress comprising a pair of'triangular loops embedded in the mattress with the hypotenuse legs of the angles crossing each other intermediate the top and bottom sides of the mattress and with the bases of the angles lying in overlapped position atone side of the mattress, the cord forming the Vertical legs of the'angles being continued at right-angles from one of the vertical legs across the face of the mattress to the next stitch, and a top connection uniting the acute ends of the hypotenuse legs and extending from one vertical leg to the other, said triangular loops "having a lock stitch at each acute end thereof and another lock stitch at the base portion.

5. A look stitch for the roll edge of a mattress, said stitch being of rectangular form, the long sides of the said rectangle extending through the mattress and the short legs thereof lying along the top and bottom faces respectively of the mattress, said stitch also having intersecting diagonals Within the rectangle, the ends of the diagonals being looped around the sides of the rectangle at the corners thereof.

In testimony whereof, I have hereunto subscribed iny name this 3rd day of January,

HARRY E. WOLF. 

